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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class12  >>  Vector Algebra
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Q)

If $\overrightarrow a\:\:and\:\:\overrightarrow b$ are unit non collinear vectors and if $\overrightarrow u=\overrightarrow a-(\overrightarrow a.\overrightarrow b)\overrightarrow b$ and $\overrightarrow v=\overrightarrow a\times\overrightarrow b$ then $ |\overrightarrow v|= ?$

$\begin{array}{1 1} |\overrightarrow u| \\|\overrightarrow u|+|\overrightarrow u.\overrightarrow a| \\ |\overrightarrow u|+|\overrightarrow u\times\overrightarrow b| \\ |\overrightarrow u|+\overrightarrow u.(\overrightarrow a+\overrightarrow b) \end{array} $

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